论文部分内容阅读
采用动力学数值模式对风暴潮沿珠江河道上溯的个例进行了模拟 ,并就有关机制进行讨论 .结果显示 ,风暴潮位是否沿珠江河道向北逐渐递增 ,和风暴强度有很大的关系 ,也和风暴登陆的路径有关 ;南海的热带气旋多数是西行的 ,这样就使本文研究的对象像是“过路”的风暴 ,伶仃洋的聚水面积不算大 ,加上蛛网般河网的分散作用 ,都使珠江一线的风暴增水很少超过 2 5m .但即使这样规模的增水 ,也对河口平坦地区造成很大威胁 .由于天文潮的耦合 ,以及浅水效应 ,风暴潮常有不同程度的变形 .本文的模拟中 ,模式、参数和计算对象等早已选好 ,计算时只作了少许调整 ,就能得到较好的结果 ,说明模式是合理和可靠的 .
The dynamic numerical model was used to simulate the cases of storm surges along the Pearl River and the mechanism was discussed.The results show that whether the storm surge increases gradually to the north along the Pearl River has a great relationship with the storm intensity And the storm landed trails; the tropical cyclone in the South China Sea are mostly westbound, so that the object of this study is like a “passing” storm, Lingdingyang watershed is not large, with the spider-like river network dispersion , All of which make the increase of the storm on Pearl River less than 25m, but even this kind of increase of water level poses a great threat to the flat areas of the estuary. Due to the coupling of astronomy and the shallow water effect, the storm surge often has different degrees In the simulation of this paper, the model, the parameters and the calculation objects have been selected well, and only a little adjustment can be made in the calculation, the better result can be obtained, which shows that the model is reasonable and reliable.